Revenue during the quarter grew 15.85 percent to $3,384 million from $2,921 million in the previous year period. Gross margin for the quarter expanded 260 basis points over the previous year period to 74.50 percent. Total expenses were 66.76 percent of quarterly revenues, down from 69.80 percent for the same period last year. This has led to an improvement of 305 basis points in operating margin to 33.24 percent.

Operating income for the quarter was $1,125 million, compared with $882 million in the previous year period.

Thomas F. Farrell II, chairman, president and chief executive officer, said: "We are pleased with our financial performance in the first quarter. Operating earnings, excluding a weather impact of 8 cents per share, were near the top of our guidance range. "We continue to execute with strong operational and safety performance, and have seen significant progress on growth investments that will total over $4 billion this year. "Construction of Greensville County Power Station is proceeding on time and on budget. The project is now about 30 percent complete and expected to achieve commercial operations in late 2018. "Our Cove Point Liquefaction project is 89 percent complete. We received approval for feed gas to begin commissioning the power block and continue to work toward having the project in-service late this year. "We continue to see long-term infrastructure growth prospects across our footprint. We are in development or construction on over 3 billion cubic feet per day of gas infrastructure projects. This includes the Atlantic Coast Pipeline project, which is expected to begin construction in the second-half of 2017."

For financial year 2017, Dominion Resources forecasts diluted earnings per share to be in the range of $3.40 to $3.90 on adjusted basis.

For the second-quarter 2017, On an adjusted basis, the company forecasts diluted earnings per share to be in the range of $0.60 to $0.70.